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Oxyprora carinatum
Taxonomy
Conocardium carinatum was named by Hall (1856). Its type specimen is AMNH-F1 39210, a shell, and it is a 3D body fossil. Its type locality is Hunter Valley Quarries, 3 miles northwest of Bloomington, which is in a Meramecian carbonate limestone in the Salem Formation of Indiana.
It was recombined as Bransonia carinatum by Hoare (1990); it was recombined as Hippocardia carinatum by Hoare (2006); it was recombined as Oxyprora carinatum by Wagner (2023).
It was recombined as Bransonia carinatum by Hoare (1990); it was recombined as Hippocardia carinatum by Hoare (2006); it was recombined as Oxyprora carinatum by Wagner (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1856 | Conocardium carinatum Hall p. 14 |
| 1882 | Conocardium carinatum Whitfield p. 59 figs. pl. 7 f. 18-19 |
| 1883 | Conocardium carinatum Hall p. 345 figs. pl. 30 f. 18-19 |
| 1990 | Bransonia carinatum Hoare p. 730 |
| 2006 | Hippocardia carinatum Hoare p. 160 figs. 1.20-1.28 |
| 2023 | Oxyprora carinatum Wagner p. S3065 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Oxyprora carinatum Hall 1856
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Hall 1856 | Shell subtrigonal, gibbous in the middle, anterior end cordate; hinge line straight; beaks very small, strongly incurved, rising little above the hinge line; posterior side straight above, sloping upwards from below, and gradually tapering to the extremity, faintly constricted at its junction with the body of the shell and gaping below; hiatus elongate-lanceolate, crenulate; umbonial slope strongly carinated; carina reaching from beak to base where it is strongly salient; anterior side obliquely truncate, and abruptly produced into a small conical tubular extension of the hinge line. Surface marked by simple radiating ribs and extremely fine concentric strie, which in passing over the ribs give the surface a granulated appearance. On the anterior slope the ribs are finer and closer than on the sides of the shell, and strongly curved. Length, from .20 to .33 of an inch. | |
| R. D. Hoare 2006 | Small, truncate posteriorly; dorsal margin straight; body not inflated, separated from snout by change in concavity; beaks opisthogyrate; primary carina smooth, narrow, alate laterally and ventrally forming a short hood; anterior gape widest anteriorly, extending length of snout as narrow, triangular opening; gape bordered by moderately large denticles; 11 low, closely-spaced, concentric costae on rostral face, area around base of rostrum smooth; length of rostrum unknown; rostral clefts present; ventral orifice small; 7 narrow, widelyspaced body costae bifurcate ventrally; 12-13 costae on snout, more closely-spaced anteriorly; outer shell layer thin with numerous fine, closely-spaced, comarginal lirae, most prominent on snout; larval shell not present. |